Throughout the filming he stayed totally in character, and only after Peter Jackson called "cut" for the last time did he drop the accent he adopted for the role. When Jackson heard his real accent, he assumed Dourif was just joking around!

Quotes

"What got me excited to do Grima Wormtongue is when I was young I went through a period in boarding school were I was picked on alot. And there is something about Grima, he has been picked on when he was a kid, he (Grima) is so distrustful, he is so easily corrupted, He is so ugly, and he wants somebody, he wants to love somebody, and he can't, because nobody will have him."